For a Hi Line kid, going to Sleeping Buffalo was like going to Disneyland back in the day. Not only did they have the hot springs- they had an outdoor pool and waterslides. Check out this big news.
Disc golf has come a very long way in Montana over the last couple of decades. There are disc golf courses all over the state along with events and tournaments in just about every town. You can even (legit) play disc golf in some Montana State Parks.